TCS 1673 – K7D4 Decoder – N Scale


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SKU: TCS1673 Category:


The K7D4 is a 4-function N-scale drop-in decoder designed to fit Kato locomotives. Examples include the following:


  • ACS-64
  • EMD SPD40F
  • Ge 4/4 II and III “Glacier Express”

See the installation pages for a full list of compatible engines!

  • Back EMF Load Compensation:

Provides superior slow speed control and high performance under load.

  • Quiet Drive:

Super-quiet motor control for “buzz” free motor performance.

  • DC Mode:

Decoder will automatically detect DC power. You can also configure how your lighting effects function on DC.

  • Variable Momentum:

Allows you to make custom acceleration and deceleration curves.

  • Incandescent Bulb Support:

This decoder can be used with 12 Volt bulbs.

  • Function Remapping:

Buttons 0 through 12 may be used to control the lighting functions of this decoder.

  • Programmable Lighting Effects:

Choose from 20 separate user-programmable lighting effects!

  • Dimmable Brightness:

Configure multiple different brightness levels for your LED’s or incandescent bulbs.

  • Decoder Lock:

Feature which prevents accidental/unwanted programming while activated.

  • Airwire™ Compatible:

Fully compatible with Airwire™ operation.

  • User-Loadable Speed Tables:

Configure custom speed curves and set speed limits.

TCS N Scale
K7D4 Decoder

Additional information

Weight 0.0625 lbs
Dimensions 9.5 × 6 × 0.25 in




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